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>Sounds like you need a calibrated hole :)
> I didn't feel much "suck" on the end of the tube with my finger, but
> the first time I hooked it up and tested it I saw the glass bow in so
> much I feared it would break! I just need to find out if I can run
> the shop vac with low air flow for the 5.5 minutes it takes to do an
> exposure.
>
>